Analysis of the Disturbance to Surrounding Soils During Shield Driving
for the Hangzhou Metro Line 1 Project
(1 School of Engineering, City College, Zhejiang University, Hangzhou 310015;
2 Department of Geotechnical Engineering, Tongji University, Shanghai 200092)
Abstract：
Using the right tube tunnel of the Hongpu Station - Jiubao Station section of the Hangzhou Metro Line 1 as a background, experimental monitoring was carried out to study the variation of surrounding soils during the process of shield driving. The monitoring items included ground surface settlement, layered settlement, horizontal displacement, and pore water pressure. Monitoring data analysis indicates that: (1) ground surface settlement mainly occurs when the shield cutterhead approaches the monitoring section and the shield tail leaves the monitoring section; (2) while the shield is passing through the monitoring section, the settlement of the soil mass around the shield is obvious with different degrees of heaving before and after the shield passes through. The lateral horizontal displacement of the soil mass is larger, indicating that the soil mass is distinctly squeezed; and (3) when the shield cutterhead is arriving at and the shield tail is leaving the monitoring section, the pore water pressure always presents a regular variation of abruptly increasing and afterwards sharply decreasing, reflecting the states of disturbance of the soil mass being squeezed, restored, and loosened.
YU Xing-Fu-1,
Ren-Hui-2,
Hu-Xiang-Dong-2
. Analysis of the Disturbance to Surrounding Soils During Shield Driving
for the Hangzhou Metro Line 1 Project
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(5): 168-173
2014, Vol. 51 